<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/">权限管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
        <!-- 添加用户按钮 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加用户</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
         <el-table :data="roleList" border stripe>
             <el-table-column type="expand">
                 <template slot-scope="scope">
                     <!-- 先进行栅格系统的布局 第一列渲染以及权限 第二列渲染二级和三级权限 -->
                     <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'' , 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id" >
                         <el-col :span="5">
                             <el-tag closable @close="removeRightById(scope.row,item1.id)">
                                 {{item1.authName}}
                             </el-tag>
                             <i class="el-icon-caret-right"></i>
                         </el-col>
                         <el-col :span="19">
                             <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                 <el-col :span="6">
                                     <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                                        {{item2.authName}}
                                    </el-tag>
                                    <i class="el-icon-caret-right"></i>
                                 </el-col  >
                                 <el-col :span="18">
                                     <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)" >{{item3.authName}}</el-tag>
                                 </el-col>
                             </el-row>
                         </el-col>
                     </el-row>
                 </template>
             </el-table-column>
             <!-- 索引列 -->
             <el-table-column label="序号" type="index"></el-table-column>
             <el-table-column  label="角色名称" prop="roleName"></el-table-column>
             <el-table-column  label="角色描述" prop="roleDesc"></el-table-column>
             <!-- 为了使按钮都在一行设置一下宽度 -->
             <el-table-column label="操作" width="300px">
                 <template slot-scope="scope">
                     <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                     <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                     <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                 </template>
             </el-table-column>
         </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed"
  >
  <!-- 树形控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights" >确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>
<script>
export default {
    data(){
        return{
            roleList:[],
            setRightDialogVisible: false,//控制权限对话框显示与隐藏
            // 所有权限的数据
            rightslist:[],
            // 树形控件的属性绑定对象
            treeProps:{
                label: 'authName',
                children: 'children'
            },
            // 默认选定的节点值数组
            defKeys:[],
            // 当前即将分配权限的id
            roleId: ''
        }
    },
    created(){
        this.getRoleList();
    },
    methods:{
        async getRoleList(){
            const {data:res} = await this.$http.get("roles")
            if (res.meta.status !== 200) {
                return this.$message.console.error('获取角色列表失败');
            }
            this.roleList = res.data;
            console.log(res.data,'角色列表')
        },
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            console.log(confirmResult)
            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除!')
            }

            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败！')
            }
            // 不建议调用这个函数因为会发生页面的完整渲染
            // this.getRoleList();
            // 直接改变children属性，这样就可以局部刷新了
            role.children = res.data;
        },
        // 展示分配权限对话框
        async showSetRightDialog(role){
            console.log(role.id,'45613156')
            this.roleId = role.id;
            // 获取所有群贤数据
            const {data:res} = await this.$http.get('rights/tree');
            console.log(res.data,'获取的列表数据')
            if(res.meta.status !== 200){
                return this.$message.error('获取权限数据失败')
            }
            // 把获取到的权限数据保存在data中
            this.rightslist = res.data;
            console.log(this.rightslist)
            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)

            this.setRightDialogVisible = true;
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
        // node判断是否是三级节点，arr进行保存
        getLeafKeys(node,arr){
            // 如果当前node节点不包含children 属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }

            node.children.forEach(item => {
                this.getLeafKeys(item,arr)
            });
        },
        // 监听分配权限对话框的关闭事件，关闭后要清空列表
        setRightDialogClosed(){
            this.defKeys = [];
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()    
            ]
            console.log(keys,'分配权限')
            const idStr = keys.join(",");
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败！')
            }

            this.$message.success('分配权限成功！')
            this.getRoleList();
            this.setRightDialogVisible = false;
        }
    }
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
